I don't think Toy Story belongs anywhere on a Disney films list. It is a Pixar film. Disney co-branded it, and handled the distribution and tie-in stuff. To quote Pixar's latest Annual Report on Form 10-K:

Pixar's first three films, Toy Story, A Bug's Life and Toy Story 2, were created and produced by Pixar and were marketed and distributed by The Walt Disney Company. . .